Foot accelerator for motor cycles



p 13 927 D. MCDOUGALL FOOT ACCELERATOR FOR MOTOR CYCLES Filed Nov. l2, 1926 2 Sheets-Sheet l s ept 13 1927 D. MCDOUGALL FOOT ACCELERATOR FOR MOTOR CYCLES 2 Sheets-Sheet Filed Nov. l2, 1926 l vINVENTO-R.' @MMMQW-d w fr/YA I' Patented 4Sept. 1.3, 1927.

unirse vs'r-Afriis PATENT I oFFicE'. 1

- DONALD MCDOUGALL, OF NEWARK, YNEVI JERSEY. Y.

FOTi-,ACCELERATOR FOR MOTR CYCLES.'

yfiippncatimn f iiefipivovember 12,1926, semi no. 147,887.

s 'Heretofore in motorcycles the gas throttle hasfbeen controlled 'byl twisting orturning one of the`handle-b`ars,-andin some uses of motorcycles, fasfor. example by policemen, the result has been that if the policeman has Yoccasion to ltake his handoff the lhandle-bar for some other purpose, such vas using his gun, he -loses control of the motorcycle, so far as c acceleration is concerned. It has been sought toremedy thisfby applyingthe control'to the left handle-bar, but obviously'it is sometimes necessary'orfdesirablefl for the officer to remove' his leftliand, for some l urpose or other, andthus he loses :control o theaccel-v eration. YIn suchlwork rasthat of a motorn cycle fiicen'uponaJ ,crowdedl highway-it hasxbecome "in V,this day vand time a very serious and dangeronshandicap for the rider to losecontrol evenl momentarily, of the ac- Celeration of liismotorcycle, and not only does4 itleadkr to great danger` both to 'the motorcyclist and others upon the road, but also ity greatly'handicaps an officer in his Work., ,I Y

The objectsof this invention are to enable the driver of a motorcycle to control the gas throttle bymeansfof'hisV lfoot and thus leave his hands freelfor otherpurposes;K to securev such a foot control as will not interfere with the usual control through the handle-bars,

Y so that either control can beused, as desired;

' parts ofthe invention and other parts closee to secure for theVV controla construction and arrangement of treadle at'the usual footboard' whiclrwill operatewithout inter;

yference with other adjacent parts;` toV Vsecure v a treadle which willfold idly with the footboardin case the motorcycle laid upon its side, to secure'a' construction which can be applied to motorcycles 'already Vin use, with-s out reconstruction of them, andtofobtain other fadvanta'ges 'fand results 4vas may be broughty out by the following description.,v

Referring to the accompanying drawing, in which like characters of reference indicate the saine partsithroughoutthe several views,

Figure 1 isa side elevation of a motorcycleV yhaving my nventionfapplied .tliereto, the

ly yrelated theretol being shown in vfull linesy and therest of the motorcyclein dotted lines,

forgreater clearness; 1

Figure 2 is a' detail plan view, partly in section, adjacent to the carbureter;

Figure 3 is a" sideelevation of a modified form of my invention j l Figure itisa d'talilpplan, partly in section, .ofthe parts of said modified construction adjacent the carbureter;

Figure. 5 is a front elevation of the parts of my improved control andsome adjacent partsl of thefmotorcycle;Y i Y igu're 6 is` a plan of thelfoot-board at which my improvedcontrolis applied;

Figure 7 is a side elevation-of. the same;

"Figure 8 is an elevation of tlievsame viewed fromfits side next theY motorcycle, andA Figure 9 is a detailsection ofthe control treadle,k on line 9+9v of Fig. r6, lookinglin the-'direction indicated by the arrow.

In saidV drawings, and particularlyA Fig-l urel', the reference numeral `14 indicates the handle-bar nearest the observer and byvturning Lor' twisting of which the) gas` throttleI is commonly 'controlled f, by -a wire leading through the iexiblecasing 2as is common and well-known. In carrying out my invention in its preferred form, as .further illus# tij'ated in Figure 2, said flexiblecasingextends into the end of a cylindrical socket V3 yprojecting from an elbow 4 which is pivoted as at 5 to the arm v6 of thev control or butterfly valve, not shown, ofthe carbureter 7 ,Y see Figure 1.A The wire-v extending from the handlebar through the flexible casing has heretofore extended lthrough a hole 8 drilled in theelbowl and when properly adjusted has been clamped therein by'setk screws, so that as the wire'moved back and forth longitudinally, upon twistingthe handle-bar 1, the, elbow 4 was reciprocated andthe valve ofthe lcarbureter opened or closed as desired.v

In myimproved constructioifi, *IV sever the wire` 9 at lthe `entrance to the hole 8 in the elbow,-as at 10, and leave the end 11 clamped in thek hole 8 to "close 'the same., The said wire 9 thus merely'abuts against the elbow etfand will move the same in only one vdirection, that is when it pushes agaiiistkrsaid elbow 4. The elbow is normallyheld at the extremity of Vits movement inthe'other. direction, which ,closes the carbureter valve, by lmeans of aV springv 12 preferably extending` from one of Athe set screws 13 vwhich the tank of the motorcycle, 'as shown in ico l Figures l and Y`5, or `anyother stationaryV art." l c P -The'othe'r ordownwardly extending arm 16v`o`f the bracket 15 has fulcrumed upon itself a bell-crank lever 17 whose upwardly projecting arin18 is joined by a connecting from the handle-bar to said member to move holding said member normally iii position 10 it against said means, a foot-operable mechto close the control, a Wire extending from Vanism,` and a connection extending from said the handle-bar to said member to move it mechanism` to said member to lmove it against said means and permitting independagainst'said means, one of said connections ent movement of the member, a foot pedal permitting movement of the member inanda connection extending rom'said pedal 15 dependent of the other connection. to saidmember to move it against said 9. In a motorcycle, the combination with means. Y

a gas control member, of means yieldingly DONALD MCDOUGALL; 

